// Copyright Qdrant
// Copyright 2021 Datafuse Labs
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use std::io::Result;
use std::io::Write;

static ZEROS: [u8; 8096] = [0u8; 8096];

pub trait WriteZerosExt {
    /// Write `len` zeros to the writer.
    fn write_zeros(&mut self, len: usize) -> Result<()>;
}

impl<W: Write> WriteZerosExt for W {
    fn write_zeros(&mut self, mut len: usize) -> Result<()> {
        while len > 0 {
            len -= self.write(&ZEROS[..ZEROS.len().min(len)])?;
        }
        Ok(())
    }
}
